B-Pump Sub-assembly shown from top. View shows outlet flange facing camera - the splined drive shaft can just be seen at the top of the screen. Note the three fine rings milled into flange face.The rings were designed to improve keying for the 'putty' that was used to seal the connection between the flange face and the inlet pipe. Note, small self-purge orifice on the lower left of the inlet throat baffle. Unlike the upper purge hole in the LOX casing, the shallower face angle at the location of the hole in the fuel pump casing, was more accessible to drilling and was therefore not problematic. 3D model Ray Matter
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